Home / 156,639.37-216,156.53-85,017.86

Finding the Fourth Proportional to 156,639.37, 216,156.53 and 85,017.86

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Solution

The fourth proportional to 156,639.37, 216,156.53 and 85,017.86 is: 117,321.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,639.37 : 216,156.53 = 85,017.86 : x
  2. Step 2: Convert to fraction form
    156,639.37/216,156.53 = 85,017.86/x
  3. Step 3: Cross multiply
    156,639.37x = 216,156.53 × 85,017.86
  4. Step 4: Simplify right side
    156,639.37x = 18,377,164,524.84
  5. Step 5: Solve for x
    x = 18,377,164,524.84/156,639.37
  6. Step 6: Final answer
    x = 117,321.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.